/Engine/Plugins/Runtime/DataRegistry/Source/DataRegistry/Public/DataRegistrySource_CurveTable.h
Returns what subclass of source to use for children, must be overridden!
virtual [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UDataRegistrySource](API\Plugins\DataRegistry\UDataRegistrySource) > GetChildSourceClass() const